2006A&A...454..493L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST06:29:57

2006A&A...454..493L - Astronomy and Astrophysics, volume 454, 493-501 (2006/8-1)

Strange magnification pattern in the large separation lens SDSS J1004+4112 from optical to X-rays.

LAMER G., SCHWOPE A., WISOTZKI L. and CHRISTENSEN L.

Abstract (from CDS):

We present simultaneous XMM-Newton UV and X-ray observations of the quadruply lensed quasar SDSS J1004+4112 (RBS 825). Simultaneously with the XMM-Newton observations we also performed integral field spectroscopy on the two closest lens images A and B using the Calar Alto PMAS spectrograph. In X-rays the widely spaced components C and D are clearly resolved, while the closer pair of images A and B is marginally resolved in the XMM-EPIC images. The integrated X-ray flux of the system has decreased by a factor of 6 since it was observed in the ROSAT All Sky Survey in 1990, while the X-ray spectrum became much harder with the power law index evolving from Γ=-2.3 to Γ=-1.86. By deblending the X-ray images of the lensed QSO we find that the X-ray flux ratios between the lens images A and B are significantly different from the simultaneously obtained UV ratios and previously measured optical flux ratios. Our optical spectrum of lens image A shows an enhancement in the blue emission line wings, which has been observed in previous epochs as a transient feature. We propose a scenario where intrinsic UV and X-ray variability gives rise to line variations which are selectively magnified in image A by microlensing. The extended emission of the lensing cluster of galaxies is clearly detected in the EPIC images, we measure a 0.5-2.0keV luminosity of 1.4x1044erg/s. Based on the cluster X-ray properties, we estimate a mass of 2-6x1014M.

Abstract Copyright:

Journal keyword(s): gravitational lensing - quasars: emission lines - quasars: individual: SDSS J100434.91+411242.8 - galaxies: active - X-rays: galaxies: clusters

Nomenclature: Figs 1,2: [LSW2006b] XN (Nos X1, X2).

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * eta Hya bC* 08 43 13.4749927 +03 23 55.186711 3.380 4.100 4.300 4.37 4.56 B3V 384 1
2 QSO J1004+4112C QSO 10 04 33.831 +41 12 34.79   19.81 19.68     ~ 34 0
3 QSO J1004+4112D QSO 10 04 34.066 +41 12 49.01   20.70 20.43     ~ 32 0
4 ClG J1004+4112 ClG 10 04 34.180 +41 12 43.50           ~ 38 3
5 QSO J1004+4112A QSO 10 04 34.8073240338 +41 12 39.230410918   18.74 18.62     ~ 43 0
6 QSO B1001+4127 QSO 10 04 34.9236085542 +41 12 42.771226567   19.14 19.03     ~ 169 1
7 NGC 4051 Sy1 12 03 09.6098828919 +44 31 52.693714606   11.08 12.92 9.94   ~ 1992 1

    Equat.    Gal    SGal    Ecl

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2020.07.10-06:29:57

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